Im lighter than the feather but the strongest man can not hold me for long

Which best summarizes the finding of avery? a. some traits are recessive. b. humans reproduce sexually. c. dna is a transforming factor. d. traits cannot be inherited.

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings